Motorscope



April 9, 1940. A B NASH 2,196,936

MOTORSCOPE Filed April 14, 1938 Wig. $3

Z I 22 I I i Patented A r. 9," 1940 1 new UNITED STATES PATENT OF-FICEo'roitsooPE I Austin B. Nash, Oklahoma City, Okla, I Application April14,1938, Serial No. 202,090 V 1 Claim, (01. 88-71) This inventionrelates to a device for use in inspecting the interiorof an internalcombustion engine. An object of this inventionis to provide a de-.

I vice which istermed a Motorscope and which opening in an engine sothat the interior of the 10 engine can be inspected without removing thehead of theengine, i

Another object of this invention is to provide a device of this kindwhich includes an adjustable light reflecting means so that the lightrays and lighted interiorof the engine can be readily viewed from theeye-piece carried by the outer end of the device. Y j

Another object of this invention is to provide in a device of thiskind,- means whereby if desired 20 the interior of the engine maybemagnified at the eye-piece end of the device so that a very closeinspection may be had of the interior of the engine.

A still further objectof this' invention is to 25 provide adevice ofthis kinduwhich canv be quickly connected to the electric current supplypresent in the vehicle, the device including a light bulb and a switchwhich may be operated to lightup the interior of the engine.

30 To the above objects and others which'may hereinafter appear,theinvention consists of the novel construction, combination'andarrangement of parts as will be more specifically referred to I Figure 3is a longitudinal section taken on the line 3- 3 of Figure 1,

Figure 4 is an enlarged fragmentary longi tudinal. section 'of thereflector at the lower end 50 of the device,

Figure 5 is a sectional view taken onthe line 5-5 of Figure 4, and V vFigure 6 is a fragmentary longitudinal section of a modified form "ofthis device. 55 Referring to the drawing, the numeral l dessaid other,parts.

ignates generally'a tubular. member formed of what may be termed a frontpart Ill a rear part [0 and a. pair of side parts [0% The front part l0is of less length than and hasits inner or lower end spaced from theinner ends of the The. lower or inner end terminalportions of the partsI0 are of reduced thickness and set up so as to form the rear side ofsuch portions of obtuse angled contour. The- 0 lower orinner endterminal portion of the part 10 Hi" has the major part ill thereoflfiat,disposed at an obtuse angle and merging at its lower end into ahorizontal part I0 4 The lower end terminal portion of part Illv merges;into the. rear sides and also into the lower "ends of the lower or innerterminal-portions of the parts N3 The remaining portion of the part Nimerges into the parts 1. The part Hi merges throughout the lengththereof into the parts i The inner or lower end of part H] is spacedfrom the inner or lower end terminalportions of the parts Ill. Themember II! is open at its upper end, and it is formed with an openingIll at the lower end of its front and such opening lfl is disposed atright angles to the said open upper end. Formed integral with the inneror lower end of part Ill and the lower or inner end terminal portions ofthe parts 1, as well as the portion It) is the inner end of a hollowextension I l of rectangular contourin vertical cross section. Theextension II is disposed at right angles to the member I 0 and hassecured to and lengthwise of the inner face of its top Walli l a socketl2. The extension II at its inner ends opens into the member H), and isformed-with 'an outer open end indicated at l3. Mounted in the socket i2is an electric, light bulb I4. 1 Secured to the outer face of the part[0 of member lB-isa sw itch l5 from which extends a two-wire conductorI6 passing through anopening [6 in part II) of member Ill, thencedownwardly through the latter into extension I l and then connectedto'the bulb 14. The switch I5 is adapted to be connected to a, source ofcurrent supply by means of a pair of clips or connectors H and I8. Inthe present 5 instance the light bulb I4 is a bulb of the '6-volt type,which is of the same power as the storage battery normally used inamotor vehicle so that one of the connectors or clips may be connected tothe frame of the vehicle and the other connector or clip may beconnected to the other or positive side of the electric circuit formingpart of the motor vehicle. The switch I5 in the present instance is inthe form of a toggle switch, although I do not wish to be limited to thepar- ,r "L 7 7: ticular type of switch shown as this switch I5 is ofconventional construction and is adapted to be maintained in either openor closed position depending on the relative position of the operator 1%thereof.

The upper or outer end of the tubular member I 0 is provided with a capor eye-piece 20 having a cylindrical flange 2| which is threaded as at22,

unto the upper or outer end of the tubular member I 0. The eye-piece 20is provided With an axially disposed sight opening 23'so that an eye maybe engaged with the eye-piece 20 and the interior of the tube I I)viewed from above. H

The part W of the inner or lower terminal portion of the part Ni of themember In provides an angularly disposed wall 25 extending for: wardlyto a. point in close proximity to the junction between member Ill andextension H. said wall 25 is disposed at an obtuse angle to the lengthof the tubular member [El and the longitudinal axis of the extension ll. The part fil of the lower or inner end terminal portion of the partlil forms a support and also provides a closed lower or innerend for themember It. Opposing the inner face of wall 25 and disposed at an obtuseangle is a reflector structure generally indicated at M, which in thepresent instance, comprises a flanged frame member 26 encompassing amirror 2?. The frame 2% includes a back .wall or plate 28 havingasubstantially U-shaped flange 29 engaging over the marginal edgeportions of the mirror 2?. The lower end of the frame 26 is providedwithan obtusely disposed extension 38 which is adapted to be soldered orotherwise fixedly secured to the upper face of the part 58 of the lowerterminal portion of the part Ni of member it. The remaining portion ofthe frame 25 is preferably free and is of a substantially resilientconstruction which is normally biased in the direction of the angularlydisposed Wall 25. A screw 32 is threaded through the wall 23 and engagesat its inner end against the frame 26 so that the angular position ofthe frame 26 and the reflector or mirror 2? may be finely adjusted inorderthat the parts of the engine disposed forwardly of the open end i 3of the extension I l maybe readily viewed through the eye-piece 2i 7InFigure 6 there is disclosed a slightly mode ified form of thisinvention wherein the tubular member m is provided with an eye-piece 2thon the upper end'thereof which has a relatively long cylindrical flange2P threaded onto the upper end of the tubular member Hi This eyepiece 20has an axially disposed sight opening 23 and a magnifying glass 33 ismounted in a plate 36 which'is interposed between. the eyepiece Zfl andthe upper end of the tubular member Hi In the use of this device a sparkplug orother member connected to an internal combustion enw The gine maybe removed so that access may be had to the interior of the engine. Theextension; H

is then projected throughthemopenin'g in the engine and the connectorsHand is. are con-, nected to the electric circuit in the vehicle. The

switch l5 may have the'operator l9 moved to a switch-closing position,thereby lighting up the bulb M. The. light rays-fromthe bulb ls will beprojected interiorly, of theengine and the inside of the engine may thenbe viewed through the eye-piece 20. The reflector member zd may beaccurately adjusted through the medium of the adjusting bolt 32, theflange or extension 30 carried by the frame 26 of the reflector memberpermitting the accurate adjustment of this reflector 3 '7 member.

It will be apparent from the foregoing that a relatively simpledevicehas been provided by means of which the interior of the vehiclemay be inspected without removing some of the largeor major parts of thevehicle and in this manner the operator of thedevice can quickly andeasily determine whether itIiS necessary to remove the.

head of the engine or other major parts in order to Work upon theinterior of ,the engine. What I claim is: s

A device for inspecting the interior of an;

internal combustion engine or the like, comprising an elongated tubularmember, a cap at oneend of said memberprovided with a sight opening,

an obtusely disposed flat'wall at the other end of about three sides ofsaid back wall, a mirror en-, 1

gaging between said flanges, an; obtusely disiposed resilient extensionformed with said back wall and projecting intojand fixed to the lower;

rear portion of said first extension, andnormally urging the free upperend of said frame toward said back wall, an adjusting screw threadedthrough said obtuse wall and engaging said back Wall of said mirrorframe, a light socket within said first extension forwardly of saidmirror and fixed to the upperportion of said firstext ension,

a light bulb in said socket and projecting forwardly thereof, and aswitch carried by said tubular member adjacent Said l d' conn cted i asto said socket. I a

' AUSTIN B. NASH;

